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DR. MARK M WILLIAMS MD
NPI 1295760601
Orthopaedic Surgery in Fresno, CA

Active since July 12, 2006
8221 N FRESNO ST, FRESNO, CA 93720(559) 222-2294(888) 374-8684 Get Directions Write a Review

NPPES record last updated: February 26, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 8, 2024, Feb 1, 2020, Jun 14, 2017 (3 updates tracked since 2017).

About Dr. Mark M Williams Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK M WILLIAMS MD (NPI 1295760601) is an individual orthopaedic surgery provider in Fresno, California, licensed in California (G73670) and active in the NPI registry since July 2006.

NPPES Registry Identity

NPI1295760601
Entity TypeIndividualMale
Primary Taxonomy207X00000X
Provider Legal NameDR. MARK M WILLIAMSCredential: MD
Location Address8221 N FRESNO STFresno, CA 93720-2041
Mailing Address21c Orinda Way # 367Orinda, CA 94563-2534 · (850) 381-1010 · Fax (888) 374-8684
Phone(559) 222-2294
Fax(888) 374-8684
Sole ProprietorNo
Enumeration DateJuly 12, 2006
Last NPPES UpdateFebruary 26, 20263 updates tracked since enumeration
NPPES CertifiedFebruary 26, 2026
✔ NPI 1295760601 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
License✔ Licensed in CA · G73670
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Also ListedOrthopaedic Surgery · Sports MedicineTaxonomy 207XX0005X · License G73670 (CA)
8221 N FRESNO ST, Fresno, CA 93720
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Other Identifiers 3

Other18903FL · Blue Cross
Medicaid290994400FL
Medicaid372895100FL

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ELLIOTT A. SCHAFFZIN, M.D. INC.
Specialist
8221 N FRESNO ST
FRESNO, CA 93720
Fresno County (800) 242-0880
JAMES O'HARA
Orthopaedic Surgery
8221 N FRESNO ST
FRESNO, CA 93720
Fresno County (800) 242-0880

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Williams's NPI number?

The NPI number for Mark Williams is 1295760601. It was assigned to this individual provider in the NPPES registry on July 12, 2006.

Where is Mark Williams located?

Mark Williams practices at 8221 N Fresno St, Fresno, CA 93720. The listed phone number is (559) 222-2294.

What is Mark Williams's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

When was this NPI record last updated?

The NPPES record for Mark Williams was last updated on February 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.